Ring shank



FIG. 1 is a perspective view of a ring shank showing my new design; and,

FIG. 2 is a plan view of the ring shank of FIG. 1.

The broken line showing in FIGS. 1 and 2 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a ring shank, as shown and described. 